* Electronegativity: Oxygen has a much higher electronegativity than copper. Electronegativity is a measure of an atom's tendency to attract electrons. Oxygen strongly attracts electrons, making it highly reactive.
* Oxidation States: Oxygen readily forms negative ions (anions), typically with a -2 oxidation state. Copper, on the other hand, can exist in various oxidation states (e.g., +1 and +2), but it's not as readily oxidized as oxygen.
* Reactivity with Other Elements: Oxygen readily reacts with a wide range of elements, forming oxides. Copper, while it can form oxides, is less reactive and typically forms oxides at higher temperatures or in the presence of other reactive substances.
Practical Example: You can see this difference in everyday life. Copper can be exposed to air for extended periods without significant change. However, if you leave a piece of iron exposed to air (oxygen), it will rust (form iron oxide) due to oxygen's reactivity.
In summary: Oxygen's high electronegativity, tendency to form anions, and widespread reactivity with other elements make it significantly more reactive than copper.
